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Diffstat (limited to 'src/lib/lib7z/Bra86.c')
-rw-r--r--src/lib/lib7z/Bra86.c140
1 files changed, 70 insertions, 70 deletions
diff --git a/src/lib/lib7z/Bra86.c b/src/lib/lib7z/Bra86.c
index 1ee0e709b88..d5513ead552 100644
--- a/src/lib/lib7z/Bra86.c
+++ b/src/lib/lib7z/Bra86.c
@@ -10,76 +10,76 @@ const Byte kMaskToBitNumber[8] = {0, 1, 2, 2, 3, 3, 3, 3};
SizeT x86_Convert(Byte *data, SizeT size, UInt32 ip, UInt32 *state, int encoding)
{
- SizeT bufferPos = 0, prevPosT;
- UInt32 prevMask = *state & 0x7;
- if (size < 5)
- return 0;
- ip += 5;
- prevPosT = (SizeT)0 - 1;
+ SizeT bufferPos = 0, prevPosT;
+ UInt32 prevMask = *state & 0x7;
+ if (size < 5)
+ return 0;
+ ip += 5;
+ prevPosT = (SizeT)0 - 1;
- for (;;)
- {
- Byte *p = data + bufferPos;
- Byte *limit = data + size - 4;
- for (; p < limit; p++)
- if ((*p & 0xFE) == 0xE8)
- break;
- bufferPos = (SizeT)(p - data);
- if (p >= limit)
- break;
- prevPosT = bufferPos - prevPosT;
- if (prevPosT > 3)
- prevMask = 0;
- else
- {
- prevMask = (prevMask << ((int)prevPosT - 1)) & 0x7;
- if (prevMask != 0)
- {
- Byte b = p[4 - kMaskToBitNumber[prevMask]];
- if (!kMaskToAllowedStatus[prevMask] || Test86MSByte(b))
- {
- prevPosT = bufferPos;
- prevMask = ((prevMask << 1) & 0x7) | 1;
- bufferPos++;
- continue;
- }
- }
- }
- prevPosT = bufferPos;
+ for (;;)
+ {
+ Byte *p = data + bufferPos;
+ Byte *limit = data + size - 4;
+ for (; p < limit; p++)
+ if ((*p & 0xFE) == 0xE8)
+ break;
+ bufferPos = (SizeT)(p - data);
+ if (p >= limit)
+ break;
+ prevPosT = bufferPos - prevPosT;
+ if (prevPosT > 3)
+ prevMask = 0;
+ else
+ {
+ prevMask = (prevMask << ((int)prevPosT - 1)) & 0x7;
+ if (prevMask != 0)
+ {
+ Byte b = p[4 - kMaskToBitNumber[prevMask]];
+ if (!kMaskToAllowedStatus[prevMask] || Test86MSByte(b))
+ {
+ prevPosT = bufferPos;
+ prevMask = ((prevMask << 1) & 0x7) | 1;
+ bufferPos++;
+ continue;
+ }
+ }
+ }
+ prevPosT = bufferPos;
- if (Test86MSByte(p[4]))
- {
- UInt32 src = ((UInt32)p[4] << 24) | ((UInt32)p[3] << 16) | ((UInt32)p[2] << 8) | ((UInt32)p[1]);
- UInt32 dest;
- for (;;)
- {
- Byte b;
- int index;
- if (encoding)
- dest = (ip + (UInt32)bufferPos) + src;
- else
- dest = src - (ip + (UInt32)bufferPos);
- if (prevMask == 0)
- break;
- index = kMaskToBitNumber[prevMask] * 8;
- b = (Byte)(dest >> (24 - index));
- if (!Test86MSByte(b))
- break;
- src = dest ^ ((1 << (32 - index)) - 1);
- }
- p[4] = (Byte)(~(((dest >> 24) & 1) - 1));
- p[3] = (Byte)(dest >> 16);
- p[2] = (Byte)(dest >> 8);
- p[1] = (Byte)dest;
- bufferPos += 5;
- }
- else
- {
- prevMask = ((prevMask << 1) & 0x7) | 1;
- bufferPos++;
- }
- }
- prevPosT = bufferPos - prevPosT;
- *state = ((prevPosT > 3) ? 0 : ((prevMask << ((int)prevPosT - 1)) & 0x7));
- return bufferPos;
+ if (Test86MSByte(p[4]))
+ {
+ UInt32 src = ((UInt32)p[4] << 24) | ((UInt32)p[3] << 16) | ((UInt32)p[2] << 8) | ((UInt32)p[1]);
+ UInt32 dest;
+ for (;;)
+ {
+ Byte b;
+ int index;
+ if (encoding)
+ dest = (ip + (UInt32)bufferPos) + src;
+ else
+ dest = src - (ip + (UInt32)bufferPos);
+ if (prevMask == 0)
+ break;
+ index = kMaskToBitNumber[prevMask] * 8;
+ b = (Byte)(dest >> (24 - index));
+ if (!Test86MSByte(b))
+ break;
+ src = dest ^ ((1 << (32 - index)) - 1);
+ }
+ p[4] = (Byte)(~(((dest >> 24) & 1) - 1));
+ p[3] = (Byte)(dest >> 16);
+ p[2] = (Byte)(dest >> 8);
+ p[1] = (Byte)dest;
+ bufferPos += 5;
+ }
+ else
+ {
+ prevMask = ((prevMask << 1) & 0x7) | 1;
+ bufferPos++;
+ }
+ }
+ prevPosT = bufferPos - prevPosT;
+ *state = ((prevPosT > 3) ? 0 : ((prevMask << ((int)prevPosT - 1)) & 0x7));
+ return bufferPos;
}